/*
 * @Author: Chris:) 
 * @Date: 2019-11-23 14:30:04 
 * @Last Modified by:   Chris:) 
 * @Last Modified time: 2019-11-23 14:30:04 
 */
function toChange(){
	var oBox = document.getElementById('box');
	oBox.style.width = '300px';
	oBox.style.height = '300px';
	oBox.style.background = 'yellow';
	}
	var oBox = document.getElementById('box');
	oBox.onclick = toChange;